Abstract: A sacral support saddle has an eye (36) for receiving a first screw (38) and a cylindrical hole (37) with an axis (X5) of inclination such that, when the saddle (29) is positioned on the sacrum, the screw (38) is inserted into the sacral plate and towards the upper axis of the latter. A U-shaped body (32) delimits a channel (34) for receiving a rod, and a stopper (7) locks the rod (8) in this body. A hole (33) for passage of a second screw (42) has an axis (Y5) divergent relative to the axis (X5) of the hole of the eye in such a way as to be oriented towards the iliac mass when the saddle is positioned on the sacrum. This saddle and its two screws (38, 42) provide for a reliable anchoring of the rod of the device to the sacrum by virtue of the penetration of the screws into solid regions of the latter. This, in practice, avoids any risk of pulling out and, consequently, a second surgical intervention.

Abstract: This vertebral implant (1) comprises an osseous anchoring element (2), a body (3) having a channel (4) designed to be passed through by a rod (5), and a first screw (9) for securing with the rod, screwed through a clamp (20) able to slide on the rod and to take up a position in the body; this implant comprises at least one second screw (12, 13) for blocking the rod (5), passing through the body (3) laterally to the first screw (9) and engaged in a tapped hole (12a, 13a) inclined relative to the axis (XX) of the said first screw, these two screws (9, 12 or 13) being situated essentially in a phane perpendicular to the axis (YY) of the channel (4) and of the rod (5). The size of this implant is smaller than that of the known clamp and lock implants, and it can be put into position more easily and more quickly by the surgeon.

Abstract: This implant comprises a portion (1) intended for anchorage to bone and a body (2) for attachment to a rod (3); the body has a channel defining two side branches (4) and open on both sides of the body in order to be able to receive the rod (3); this implant contains a threaded plug (8), contrived so that it can be screwed into a female thread formed in the inner walls of the two branches (4) so that its two diametrically opposed edges bear on the rod (3), and the face of the plug (8) directed towards the rod (3) is equipped with means of gripping and attaching the plug to the latter, which can thus be clamped in translation and rotation. This arrangement considerably decreases the external bulkiness of the implant, and reduces the number of parts necessary, as well as the corresponding instrumentation.